Subdural vacuum port



FIG. 1 is a top perspective view of the subdural vacuum port of the instant invention; and,

FIG. 2 is a bottom perspective view of the subdural vacuum port illustrated in FIG. 1, further stating that the device is symmetrical and that side views/end views will not add further clarity to the claimed ornamental design. 

The ornamental design for a subdural vacuum port, as shown and described. 